185 citations · 613 across the 6 of their papers we have counts for
7 papers
Rapidly rotating neutron stars with a massive scalar field - structure and universal relations
Daniela D. Doneva, Stoytcho S. Yazadjiev
We construct rapidly rotating neutron star models in scalar-tensor theories with a massive scalar field. The fact that the scalar field has nonzero mass leads to very interesting r…
Rapidly rotating neutron stars in -squared gravity
Stoytcho S. Yazadjiev, Daniela D. Doneva, Kostas D. Kokkotas
theories of gravity are one of the most popular alternative explanations for dark energy and therefore studying the possible astrophysical implications of these theories is…
Universal I-Q relations for rapidly rotating neutron and strange stars in scalar-tensor theories
Daniela D. Doneva, Stoytcho S. Yazadjiev, Kalin V. Staykov +1
We study how rapid rotation influences the relation between the normalized moment of inertia and quadrupole moment for scalarized neutron stars. The questions o…
Slowly rotating neutron and strange stars in gravity
Kalin V. Staykov, Daniela D. Doneva, Stoytcho S. Yazadjiev +1
In the present paper we investigate self-consistently slowly rotating neutron and strange stars in R-squared gravity. For this purpose we first derive the equations describing the…
Orbital and epicyclic frequencies around rapidly rotating compact stars in scalar-tensor theories of gravity
Daniela D. Doneva, Stoytcho S. Yazadjiev, Nikolaos Stergioulas +2
We study the orbital and epicyclic frequencies of particles orbiting around rapidly rotating neutron stars and strange stars in a particular scalar-tensor theory of gravity. We fin…
Non-radial oscillations of anisotropic neutron stars in the Cowling approximation
Daniela D. Doneva, Stoytcho S. Yazadjiev
One of the most common assumptions in the study of neutron star models and their oscillations is that the pressure is isotopic, however there are arguments that this may not be cor…